Cameron McCormack:
>> Would a DOM object be able to create and return its own objects that
>> implement callback interfaces?
Boris Zbarsky:
> I'm not sure what you mean. For one thing, it's not really quite
> defined what it means to "implement a callback interface"...
Any JS non-platform object can serve as a callback interface object. So
perhaps with
callback interface A {
attribute long x;
attribute long y;
void f();
};
interface B {
A g();
};
calling B.g() could return a new JS native object with "x", "y" and "f"
properties.
The same question arises with callback functions. If you defined
callback SomeCallback = void ();
interface C {
attribute SomeCallback handler;
};
should C.handler be allowed to return a Function object that script
didn't create? Maybe.